linux-stable/arch/x86/kvm/debugfs.c
Linus Torvalds 79e06c4c49 RISCV:
- Use common KVM implementation of MMU memory caches
 
 - SBI v0.2 support for Guest
 
 - Initial KVM selftests support
 
 - Fix to avoid spurious virtual interrupts after clearing hideleg CSR
 
 - Update email address for Anup and Atish
 
 ARM:
 - Simplification of the 'vcpu first run' by integrating it into
   KVM's 'pid change' flow
 
 - Refactoring of the FP and SVE state tracking, also leading to
   a simpler state and less shared data between EL1 and EL2 in
   the nVHE case
 
 - Tidy up the header file usage for the nvhe hyp object
 
 - New HYP unsharing mechanism, finally allowing pages to be
   unmapped from the Stage-1 EL2 page-tables
 
 - Various pKVM cleanups around refcounting and sharing
 
 - A couple of vgic fixes for bugs that would trigger once
   the vcpu xarray rework is merged, but not sooner
 
 - Add minimal support for ARMv8.7's PMU extension
 
 - Rework kvm_pgtable initialisation ahead of the NV work
 
 - New selftest for IRQ injection
 
 - Teach selftests about the lack of default IPA space and
   page sizes
 
 - Expand sysreg selftest to deal with Pointer Authentication
 
 - The usual bunch of cleanups and doc update
 
 s390:
 - fix sigp sense/start/stop/inconsistency
 
 - cleanups
 
 x86:
 - Clean up some function prototypes more
 
 - improved gfn_to_pfn_cache with proper invalidation, used by Xen emulation
 
 - add KVM_IRQ_ROUTING_XEN_EVTCHN and event channel delivery
 
 - completely remove potential TOC/TOU races in nested SVM consistency checks
 
 - update some PMCs on emulated instructions
 
 - Intel AMX support (joint work between Thomas and Intel)
 
 - large MMU cleanups
 
 - module parameter to disable PMU virtualization
 
 - cleanup register cache
 
 - first part of halt handling cleanups
 
 - Hyper-V enlightened MSR bitmap support for nested hypervisors
 
 Generic:
 - clean up Makefiles
 
 - introduce CONFIG_HAVE_KVM_DIRTY_RING
 
 - optimize memslot lookup using a tree
 
 - optimize vCPU array usage by converting to xarray
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm updates from Paolo Bonzini:
 "RISCV:

   - Use common KVM implementation of MMU memory caches

   - SBI v0.2 support for Guest

   - Initial KVM selftests support

   - Fix to avoid spurious virtual interrupts after clearing hideleg CSR

   - Update email address for Anup and Atish

  ARM:

   - Simplification of the 'vcpu first run' by integrating it into KVM's
     'pid change' flow

   - Refactoring of the FP and SVE state tracking, also leading to a
     simpler state and less shared data between EL1 and EL2 in the nVHE
     case

   - Tidy up the header file usage for the nvhe hyp object

   - New HYP unsharing mechanism, finally allowing pages to be unmapped
     from the Stage-1 EL2 page-tables

   - Various pKVM cleanups around refcounting and sharing

   - A couple of vgic fixes for bugs that would trigger once the vcpu
     xarray rework is merged, but not sooner

   - Add minimal support for ARMv8.7's PMU extension

   - Rework kvm_pgtable initialisation ahead of the NV work

   - New selftest for IRQ injection

   - Teach selftests about the lack of default IPA space and page sizes

   - Expand sysreg selftest to deal with Pointer Authentication

   - The usual bunch of cleanups and doc update

  s390:

   - fix sigp sense/start/stop/inconsistency

   - cleanups

  x86:

   - Clean up some function prototypes more

   - improved gfn_to_pfn_cache with proper invalidation, used by Xen
     emulation

   - add KVM_IRQ_ROUTING_XEN_EVTCHN and event channel delivery

   - completely remove potential TOC/TOU races in nested SVM consistency
     checks

   - update some PMCs on emulated instructions

   - Intel AMX support (joint work between Thomas and Intel)

   - large MMU cleanups

   - module parameter to disable PMU virtualization

   - cleanup register cache

   - first part of halt handling cleanups

   - Hyper-V enlightened MSR bitmap support for nested hypervisors

  Generic:

   - clean up Makefiles

   - introduce CONFIG_HAVE_KVM_DIRTY_RING

   - optimize memslot lookup using a tree

   - optimize vCPU array usage by converting to xarray"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (268 commits)
  x86/fpu: Fix inline prefix warnings
  selftest: kvm: Add amx selftest
  selftest: kvm: Move struct kvm_x86_state to header
  selftest: kvm: Reorder vcpu_load_state steps for AMX
  kvm: x86: Disable interception for IA32_XFD on demand
  x86/fpu: Provide fpu_sync_guest_vmexit_xfd_state()
  kvm: selftests: Add support for KVM_CAP_XSAVE2
  kvm: x86: Add support for getting/setting expanded xstate buffer
  x86/fpu: Add uabi_size to guest_fpu
  kvm: x86: Add CPUID support for Intel AMX
  kvm: x86: Add XCR0 support for Intel AMX
  kvm: x86: Disable RDMSR interception of IA32_XFD_ERR
  kvm: x86: Emulate IA32_XFD_ERR for guest
  kvm: x86: Intercept #NM for saving IA32_XFD_ERR
  x86/fpu: Prepare xfd_err in struct fpu_guest
  kvm: x86: Add emulation for IA32_XFD
  x86/fpu: Provide fpu_update_guest_xfd() for IA32_XFD emulation
  kvm: x86: Enable dynamic xfeatures at KVM_SET_CPUID2
  x86/fpu: Provide fpu_enable_guest_xfd_features() for KVM
  x86/fpu: Add guest support to xfd_enable_feature()
  ...
2022-01-16 16:15:14 +02:00

189 lines
4.8 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* Kernel-based Virtual Machine driver for Linux
*
* Copyright 2016 Red Hat, Inc. and/or its affiliates.
*/
#include <linux/kvm_host.h>
#include <linux/debugfs.h>
#include "lapic.h"
#include "mmu.h"
#include "mmu/mmu_internal.h"
static int vcpu_get_timer_advance_ns(void *data, u64 *val)
{
struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
*val = vcpu->arch.apic->lapic_timer.timer_advance_ns;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(vcpu_timer_advance_ns_fops, vcpu_get_timer_advance_ns, NULL, "%llu\n");
static int vcpu_get_guest_mode(void *data, u64 *val)
{
struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
*val = vcpu->stat.guest_mode;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(vcpu_guest_mode_fops, vcpu_get_guest_mode, NULL, "%lld\n");
static int vcpu_get_tsc_offset(void *data, u64 *val)
{
struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
*val = vcpu->arch.tsc_offset;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_offset_fops, vcpu_get_tsc_offset, NULL, "%lld\n");
static int vcpu_get_tsc_scaling_ratio(void *data, u64 *val)
{
struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
*val = vcpu->arch.tsc_scaling_ratio;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_fops, vcpu_get_tsc_scaling_ratio, NULL, "%llu\n");
static int vcpu_get_tsc_scaling_frac_bits(void *data, u64 *val)
{
*val = kvm_tsc_scaling_ratio_frac_bits;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_frac_fops, vcpu_get_tsc_scaling_frac_bits, NULL, "%llu\n");
void kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu, struct dentry *debugfs_dentry)
{
debugfs_create_file("guest_mode", 0444, debugfs_dentry, vcpu,
&vcpu_guest_mode_fops);
debugfs_create_file("tsc-offset", 0444, debugfs_dentry, vcpu,
&vcpu_tsc_offset_fops);
if (lapic_in_kernel(vcpu))
debugfs_create_file("lapic_timer_advance_ns", 0444,
debugfs_dentry, vcpu,
&vcpu_timer_advance_ns_fops);
if (kvm_has_tsc_control) {
debugfs_create_file("tsc-scaling-ratio", 0444,
debugfs_dentry, vcpu,
&vcpu_tsc_scaling_fops);
debugfs_create_file("tsc-scaling-ratio-frac-bits", 0444,
debugfs_dentry, vcpu,
&vcpu_tsc_scaling_frac_fops);
}
}
/*
* This covers statistics <1024 (11=log(1024)+1), which should be enough to
* cover RMAP_RECYCLE_THRESHOLD.
*/
#define RMAP_LOG_SIZE 11
static const char *kvm_lpage_str[KVM_NR_PAGE_SIZES] = { "4K", "2M", "1G" };
static int kvm_mmu_rmaps_stat_show(struct seq_file *m, void *v)
{
struct kvm_rmap_head *rmap;
struct kvm *kvm = m->private;
struct kvm_memory_slot *slot;
struct kvm_memslots *slots;
unsigned int lpage_size, index;
/* Still small enough to be on the stack */
unsigned int *log[KVM_NR_PAGE_SIZES], *cur;
int i, j, k, l, ret;
if (!kvm_memslots_have_rmaps(kvm))
return 0;
ret = -ENOMEM;
memset(log, 0, sizeof(log));
for (i = 0; i < KVM_NR_PAGE_SIZES; i++) {
log[i] = kcalloc(RMAP_LOG_SIZE, sizeof(unsigned int), GFP_KERNEL);
if (!log[i])
goto out;
}
mutex_lock(&kvm->slots_lock);
write_lock(&kvm->mmu_lock);
for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) {
int bkt;
slots = __kvm_memslots(kvm, i);
kvm_for_each_memslot(slot, bkt, slots)
for (k = 0; k < KVM_NR_PAGE_SIZES; k++) {
rmap = slot->arch.rmap[k];
lpage_size = kvm_mmu_slot_lpages(slot, k + 1);
cur = log[k];
for (l = 0; l < lpage_size; l++) {
index = ffs(pte_list_count(&rmap[l]));
if (WARN_ON_ONCE(index >= RMAP_LOG_SIZE))
index = RMAP_LOG_SIZE - 1;
cur[index]++;
}
}
}
write_unlock(&kvm->mmu_lock);
mutex_unlock(&kvm->slots_lock);
/* index=0 counts no rmap; index=1 counts 1 rmap */
seq_printf(m, "Rmap_Count:\t0\t1\t");
for (i = 2; i < RMAP_LOG_SIZE; i++) {
j = 1 << (i - 1);
k = (1 << i) - 1;
seq_printf(m, "%d-%d\t", j, k);
}
seq_printf(m, "\n");
for (i = 0; i < KVM_NR_PAGE_SIZES; i++) {
seq_printf(m, "Level=%s:\t", kvm_lpage_str[i]);
cur = log[i];
for (j = 0; j < RMAP_LOG_SIZE; j++)
seq_printf(m, "%d\t", cur[j]);
seq_printf(m, "\n");
}
ret = 0;
out:
for (i = 0; i < KVM_NR_PAGE_SIZES; i++)
kfree(log[i]);
return ret;
}
static int kvm_mmu_rmaps_stat_open(struct inode *inode, struct file *file)
{
struct kvm *kvm = inode->i_private;
if (!kvm_get_kvm_safe(kvm))
return -ENOENT;
return single_open(file, kvm_mmu_rmaps_stat_show, kvm);
}
static int kvm_mmu_rmaps_stat_release(struct inode *inode, struct file *file)
{
struct kvm *kvm = inode->i_private;
kvm_put_kvm(kvm);
return single_release(inode, file);
}
static const struct file_operations mmu_rmaps_stat_fops = {
.open = kvm_mmu_rmaps_stat_open,
.read = seq_read,
.llseek = seq_lseek,
.release = kvm_mmu_rmaps_stat_release,
};
int kvm_arch_create_vm_debugfs(struct kvm *kvm)
{
debugfs_create_file("mmu_rmaps_stat", 0644, kvm->debugfs_dentry, kvm,
&mmu_rmaps_stat_fops);
return 0;
}